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The origin of sunglasses can be traced back to ancient China and Rome. The modern version of sunglasses began to emerge in the early 20th century. In 1929, Sam Foster started selling mass-produced sunglasses on the beaches of America, laying the foundation for the sunglasses we know today. For more details, click here.

Polarized sunglasses are designed to reduce glare from surfaces like water, snow, and roads. They contain a special filter that blocks intense reflected light, improving visual clarity and comfort by reducing eye strain. When shipped, a card will be included to check whether the sunglasses are polarized.

No, polarized sunglasses do not provide adequate protection for viewing a solar eclipse. Special eclipse glasses with certified solar filters are necessary to protect your eyes from the intense light of the sun during an eclipse.

You can try the following methods to fix scratched sunglasses:

1. Toothpaste: Use a non-abrasive toothpaste, apply it to the scratched area, and gently rub with a soft cloth.
2. Baking soda: Make a paste of baking soda and water, apply it to the scratch, and rub gently with a soft cloth.
3. Professional repair kits: There are specific products available in the market designed to fix scratches on lenses.

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For severe scratches, it is advisable to consult a professional optician for repair or replacement.

Photochromic sunglasses, also known as transition lenses, use photochromic molecules that change structure when exposed to ultraviolet (UV) light. These molecules darken in the presence of UV light (like sunlight) and become clear again when the UV light decreases, allowing the lenses to adjust their tint based on the lighting conditions.

Yes, some sunglasses can block blue light, depending on the lens coatings or materials used. Blue light-blocking sunglasses usually have special coatings designed to filter out a portion of blue light, reducing eye strain from prolonged exposure to screens and other blue light sources.